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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Some native low-level image processing functions.
#ifndef ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
#define ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
inline int getIntensityFast(int R, int G, int B) {
return (R + R + R + B + G + G + G + G) >> 3; // see http://stackoverflow.com/a/596241
}
inline int clamp(int min, int val, int max) {
return val < min ? min : (val > max ? max : val);
// Note that for performance reasons, this function does *not* check if min < max!
}
#endif // ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
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